Grid Resilience, Winter Resource Adequacy at PC Forefront


Stakeholders and PJM engaged in a primer for the hows, whys and wherefores for incorporating resilience into PJM system planning at the July 13 Planning Committee meeting.

Mark Sims, manager – Transmission Planning, gave an overview of several major aspects of resilience in system planning and discussed the challenges and possible next steps for grid resilience.

Resilience is preparing for, operating through and quickly recovering from a high-impact, low-frequency event, such as fuel resource security, extreme weather events and cyber or physical attacks.

Currently, following planning standards from the North American Electric Reliability Corporation, PJM plans to “critical and stressful” conditions so that Operations may manage the system, given the actual conditions on any given day.

PJM will take a more holistic approach as it incorporates resilience into all aspects of system planning, including the Regional Transmission Expansion Plan process. This means developing new analytical procedures and tools and better assessing vulnerabilities on the system and fuel resource security.

Sims highlighted the wide range of possibilities in developing the resilience criteria. Getting feedback from stakeholders is a key as PJM faces the challenges, both short-term and long-term, as it looks for opportunities to improve the system.

Patricio Rocha-Garrido, Resource Adequacy Planning, updated stakeholders on work related to a problem statement on winter season resource adequacy and capacity requirements. The key work activities from the issue charge are examining winter peak load forecasting, winter season resource adequacy and winter season reliability requirements.

PJM is looking at a number of areas impacting winter season resource adequacy, among them winter load forecast accuracy, generation performance (and how it may correlate with load levels) and planned and forced outages on the transmission system.

In its analysis, PJM has calculated winter loss of load expectation under four scenarios, including the current model and several other scenarios using historical outages (both forced and planned). As the next step in the analysis, PJM will compute summer and winter reliability requirements, both grid-wide and for selected locational deliverability areas.

Other Committee Business


  • Load Model selection process for the 2017 Reserve Requirement Study
  • Manual 14B: Region Transmission Planning Process and PJM Operating Agreement updates on redesign of the Transmission Expansion Advisory Committee (updating proposal window from 30 to 60 days)

First Reads